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Finding the Fourth Proportional to 1,433,920.89, 1,978,835.76 and 822,173.25

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Solution

The fourth proportional to 1,433,920.89, 1,978,835.76 and 822,173.25 is: 1,134,613.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,920.89 : 1,978,835.76 = 822,173.25 : x
  2. Step 2: Convert to fraction form
    1,433,920.89/1,978,835.76 = 822,173.25/x
  3. Step 3: Cross multiply
    1,433,920.89x = 1,978,835.76 × 822,173.25
  4. Step 4: Simplify right side
    1,433,920.89x = 1,626,945,828,015.42
  5. Step 5: Solve for x
    x = 1,626,945,828,015.42/1,433,920.89
  6. Step 6: Final answer
    x = 1,134,613.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.